Quote:
Originally Posted by mcbota
Also I am thinking if is worthy to change the wheels, in this moment I have 215/55/16 and I want to change with 195/65/15, but I am not sure how much I will gain!
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When they need to be changed, chose tyres with low rolling resistance.
A (rare !) or B rated for fuel efficiency on the EU tyre label.
Only change the tyres or wheels when you really have to (when worn or damaged).
You won't get back what it's costing you to change the tyres and/or wheels.
Used tyres and wheels typically don't fetch much money when you sell them, so when buying them new, you lose money on the deal.
If you can buy decent new wheels second hand, that's an option.
If you're buying different wheels, pick lighter wheels, especially for city driving.
Depending on what your greater concern is, money of fuel burned, you can pick a tyre that lasts a lot longer but uses a wee bit more fuel - making a tyre also costs resources.